DEMON CASTLE - Chapter 82

A scientific genius named Thomas Harrier was transmigrated to an imperial prince body after a car accident that took his life. He found out that he is in a world similar to our own with a timeline akin to early twentieth century. The body that he is occupying was the imperial prince of a failing empire who suddenly rose to power after a successful assassination attempt of his father. Unaware that the attack is just the beginning of what is to come. He faces many challenges throughout. Will Thomas Harrier be able to live his second life in peace while running an empire and getting it back to its former glory? Or will he succumb into a conspiracy lurking within the country's borders?

Expect some:

Cold war era techs.

Super battleship with advanced electronics, propulsion, and fire control systems?
Helicopters?
Missiles?
Modern medicines and equipment?
AC-130?
A nuke?
Challenger or Abrams or Leopard?
F-4 Phantom or MIG-21?
Colored TV's.

Everything!!!

PS. Cover not mine, I just found it on google.

Zyran has finally ascended the throne of Draconia — but true power remains out of his grasp. The royal advisors hold the reins of the kingdom, and strange changes are happening within the castle. His queens grow distant, drawn into the advisors’ web. Whispers of betrayal and hidden desires fill the air. Is Zyran truly the king… or just a puppet? And are his wives in danger?Find out as the king’s fall begins…smut---Netorare--Netori---WeakToStrong---Harem---Incest---Humiliation

Here martial arts are no longer intangible legends. They have been passed on from generation to generation and from century to century. After the confrontation with science and technology, they have completely integrated into modern society and all kinds of martial arts competitions are taking place across the country as superiority among scholars are hard to reach a consensus but not as difficult among martial artists!

Lou Cheng has found an unknown cultivation item that fuse with him and help him for the first part of martial arts, the meditation.

Towards his original dream and the glory in his heart, he will advances step by step, becoming the warrior of this modern city and the hero of the era!

- Description from Novelupdates

In the last life, Lan Muyu ran away from home for love, but accidentally bumped into her object – the adultery of the popular actress Fu Yao. In order to keep her reputation, Fu Yao and Xiao San teamed up to drug her, and she jumped down from the thirty-ninth floor so that she would not be humiliated.
Her career was ruined, and all the betrayals left her to recognize her, but after her death, her fiancee Li Ruonan tried her best to avenge her, and she was implicated in her death.​​
Once again, facing the cheating scumbag girl, Lan Muyu, who had learned from her previous life, smiled coldly. She quietly took a video and turned around and ran away. It was uncertain who would win this time.
Looking at the pouring rain, she knocked on the door of the luxury car that had just stopped, “Miss, look at me… hey!”
Before she could finish speaking, she was stuffed into the car – what kind of person was she, Li Ruonan, the fiancée she abandoned for love!
Until Fu Yao and Xiaosan’s resources were cut off, and the company’s investment became a bubble, only to find that Lan Muyu was already in the high starlight, holding the hand of the chaebol heir and smiling in all manners.
​​
Li Ruonan (attack) VS Lan Muyu (shou) cover is Shou!
Note: Gongshou 1v1 Shuangjie, the Lord of the Year has no children

Content tags: rebirth sweet text cool text revenge abuse scum
Search keywords: Protagonist: Lan Muyu; Li Ruonan ┃ Supporting role: Please pre-receive “I became the villain’s favorite after wearing the book” ┃ Others: rebirth; attack change; scumbag
One sentence introduction: However, he was taken home by his fiancée
Purpose: face danger, live optimistically

- Description from novelbuddy